Grinding-machine



ST. CLAN? LAKE.

Awe

zltented ov. 19.12?

4 SHEETS'vSHEET l.

I mlm/mk KMC@ er [SAM/1M; d

HTW/4. a

LSQBJSO ST. CLAIR LAKE.

GHINDING MACHINE.

AVPUCMION man MAR. 84 191:.

Fla

Patented Nm'. 8, 1921.

MIL/EN TOR ST. CLAlR LAKE.

GRINDING MAC '1NR APPLICATmN man mmA s, 1919.

Patented Nov, l8, 1921.

4 SHEETSWSHEET 3.

SQJSO,

/NVENTOR t /w 6,

Br @a iwf *62M A170 /vEYS ST. CLAIR LAKE.

GRHNDING MACHINE.

APPLICATION mism/11.8. |919.

Patented Nm'a 8, 192

4 SHEETS-SHEET 4.

UNITED STATES ST. lCIILILTIR LAKE, OF POUGHKEEPSIE, NEW

YORK, Assmann. To MoLNn-:PLQW con- PANY, A CORPORATION OF NEW YORK.

GRINDING- MACHINE.

Specification of Application led March 8,

T all 'w/wmt may Concern I 3e it known that I, Sfr. CLAIR LAKE, a citlzen of the United States, residing at oughkeep/sie, in the county of Dutchess and State of New York, have invented certain new and useful Improvements in Grinding- Machines, of which the followingr is a specication, reference being had therein to the accompanying drawing.

is invention relates to machines for grinding blades or blanks, and is designed more particularly for grinding the cutting edges o-n the lat knife sections of the cutter bars of reapers, mowers and like machines, and the invention consists of an improved and novel combination and arrangement ot parts by which the blanks are presented in Succession to an abrasive element or grinder which grinds them to a cutting edge, the machine operating to handle the blanks automttically to perform the grinding operation in a. speedy., uniform and effective manner. y

In the machine embodying my invention, the blanks are stored or held en masse in a, blank holder or reservoir from which they are ejected into a blank carrier, which carrier advances and presents them in succession to and impinges their edges against the grinding face of an abrasive element, and while in this position, the carrier is reciprocated so as' to move the edges ot the blank to and fro across the grinding tace, whereby the blank is ground down on a bevel to a cutting edge, and finally the ground blank is discharged from the carrier.

In the more specific embodiment ot the invention, the blank carrier is rotatably mount` ed and formed to hold a plurality of the blanks which are ejected into it in succession from the holder, the carrier being turned or advanced on its axis intermittently to successively position the blanks -for impingement against the abrasive element in the. form of a` grindstone rotating about ai axis at right angles to the axis of the carrier.- The blank holder and blank carrier are sustained b-y a slide, which is movable to and fromfthe grinder to engage and disenga-ge the blanks therewith in succession, the carrier being turned on its axis between the to and fro movements to position a new blank for grinding. The Slide is carried by a carriage which is ,movable back and forth in a path parallel with .the face of the grinder,

Letters Patent. Patented Nov. 8, 1921.

1919. Serial No. 281,394.

so that with the edge of the blank engaged with the grinder, the reciprocating movements ot the carriage will impart a like movementl to the carrier, and the edge ot' the blank will be moved back and forth against the face ot' thegrinder and the grinding ooeration eiected. 'i

n the accompanying drawings:

Flgure l isla top plan view oi' a grinding machine having my invention embodied therein.

Fig, 2 is a. side elevation ot' the same with parts broken away to expose other parts to view.

ig. 3 is a vertical sectional elevation on the. line 3-3 of Fig. l, as viewed in the direction of Jthe arrows in said ligure.

Fig. 4 is a vertical sectionV on the line H of F ig. l.

F ig. 5 is a fragmentary perspective view of the blank holder, blank carrier. and the grinder, showing the relations which said parts bear to each other.

Fig. 6 is a-.vertical sectional elevation on an enlarged scale ou the line 6-G ot Fic. 3.

ig. 7 is asimilar view on the line. T-i of Fig. 6.

Fig. 8 is a perspective view of one of the blanks before, being subjected to the grinding operation.

Fig. 9 is a similar view of the same after it has had One of the cutting edges ground thereon.

Fig. l0 is a similar view cutting edges ground.

The machine operates on a blank or plate A of the form shown in Fig. 8, and in the passage oi the blank through the machine, one of its edges is ground on a bevel to 'form the cut-ting edge a as shown in Fig. 9. She blank is then placed in the machine in a different position. and on its second passage therethrough the other edge al is ground, as shown in Fig. i0. I

The machine comprises. as its principal parts an abrasive element or grinder l. a blank holder 2 in which the blanks iii to be ground are stored, and blank carrier 2 disposed between the holder and t ie grinder in position to receive the blanks 'troni the holder and present them to the grinder.

he grinder in the present cas'e is in the formf a rotary grindstone fixed to one end of a horizontal rotary shaftf, mounted in bearings 5 on a slide 6 movable in guides ou showing both supporting trame 7, and driven by'means ot a pulley la on the shaft, from any suitable source of power, the said slide being adjustable on the traine to compensate for Wear oi the stone, as -will be more tully'described later on.

l The blank carrier 3 consists, in the present instance, of a six-sided body orl drum 3, which is iiXed to one end of a horizontal S extending at right angles to and in a '.horisontal plane with the anis oi the grindstone and parallel with the grinding face oi' the same, the said shaft being .indented in bearings in the upper ends oi 'two standards 9 rising from a slide 10- movable to and trom the grindstone, as shown more particularly in Figs. 2 and 3. The carrier is orn1'ed,as shown more particularly in Fig. 5, in each of its sides with two sockets or seats to receive and hold `a pair of tbe blanks A, the said seats being each formed with an outer Yinclined shoulder 11 and an inner oppositely inclined shoulder 12, between which the blank lits, with its bottom edge bearing against the outer 4shoulder, and with one of its edges which is to be ground bearing against the inner shoulder, in which position of the blanks the other inclined edges to be ground will project be* vond the seats in position to be presented to the grindstone. The blanks are confined between the shoulders byV means of a cover plate 18 Jforming the outer Walls of the sockets, which are open one side to receive the blanks as Ythey are ejected from the holder, as Will be presently described. From the construction set forth, it Will be noted that the yblanks held on the carrier are supported in planes which are tangente to a circle described from the axis ot the carrier as a center. Due to this fact, by turning the carrier intermittently on its axis` the blanks on the several vsides may be presented in the proper inclination to the face of the grinder to cause the edges ot the blanks to be ground down on the `proper bevel to produce the cutting edges.

The blank holder 2 is in the form of a vertical receptacle or trame formed with two vertical internal /channels in which the lanks are assembled one upon the other in tivo piles, as shown in Fig. 5, thesaid chair nels being of a contour which will hold the blanks in the same relative position they occupy in the seats or sockets in the carrier, so that they may-be ejected from the holder in this position directly inte'the Carrier. yl`he holder is fixed at its lower end to a' horizontal plate 14 sustained on a level with the up side ot the carrier, by standards 15 ext .t ng upwardly from the slide l0, and the bottoni oi the holder is open, so that the lowermost blanks of the piles will be in position. to be engaged by an ejector blade. ltviih is mounted to slide back and forth Ablade, and when the latter is a, 'assenso beneath the holder in a guideway 17 formed on the upper side of .the plate 14. When the ejector blade is in retracted position, the bottom blanks of the two piles will rest upon the bottom of the guideway 17, and as the ejector blade advances, it Will engage the edges of the blank and push them forwardly from the holder and seat them in the sockets in the carrier, as shown in Fig. 5. ln this ejecting action of a pair of blanks, the next pair above will be supported by the retracted and reaches the position Where it disengages the supported blanks the latter will drop onto the bottom of theA guideway in the position occupied by the previous blanks and in the path of the blade on its next advance.

y The slide A10 is mounted in guidevvays l()a iny a carriage 18, which carriage is movable in guides 19 on a base fra-me 20,the said guides extending at right angles to the path otl movement of the slide 10 and parallel to the tace of the grindstone. As a result of the construction described, the blank carrier 3 may be moved to and from the grindstone to carry the edges of the blanks into and out of 'engagement with the stone, which movements are el'ected by the movement of the slide 10 on the carriage 18'; and the blank carrier may be moved back and forth in the direction of its axis to reciprocate the blades While in engagement With 4the stone, these actions being et` tected by the movement of the carriage in its guides.

'in 'the operation of the machine, the blanks are .ejected from the blank holder in pairs into the seats in the carrier, and the carrier is advanced or turned on its axis to position the blanks at the proper angle to be engaged with the stone, this movement taking place While the slide 1G is in a retracted position. The slide is then moved toward the stone, thereby impinging the edges of the blanks against the stone. The carrier is uovvv at Iest,fa,ud While in this condition. thel carriage is reciprooated on its guides, thereby shitting the carrier axially and moving the edges of the blanks back and forth against the stone, which action, together With the rot-ation ot' the stone, will grind flown the edges of the blanks on a bevel and produce cutting edges thereon, the ejection of the blanks from the holder into the carrier taking place during' the reciprocating movements of thecarrier. lllhen the grinding operationds completed on a pair of the blanks, the slide 10 is retracted to give room for theturning of the carrier to bring the next pair of bla ks into position, and the foregoing opera ions are repeated, the carrier ybeing advakiced to impiuge the blanks and then reci rooated as before, and as the carrier cont nues in its rotation, the ground blanks gradually ap.-

von the slide 10.

preach the position indicated by the letter' in timed relation tozeach other, the oper-` ating mechanism for the several parts, now to be described, receiving a driving shaft 21, and being cordinated with each other in the timed relation stated.

The driving shaft 21 is mounted in bearings in the carriage 18, and is provided at one end with a driving pulley 22 which may be driven from any suitable source of power, and at its opposite end it has xed to it a pinion 23 which imparts a slow rotation by means of a train 24 of reducing gears, toa crank disk 25, the crank pin 26 of which is pivot-ally connected by means of a link 52'?y with the base frame as at 28, as shown in Fig. 8. rl`he driving shaft carries a bevel 29, see F ig. 1, which meshes with a bevel pinion 30 on one end of a countershaft 31, mounted in bearings B2 on the carriage 18, and the shaft'31 carries a worm 33 driving a worm wheel 34 on a transmitting shaft) 35 mounted in bearings 36 on the carriage and extending at right angles to the counter-shaft. The transmitting shaft carries a cam drum 37 formed with a cam slot. 38 engaging a roller 39 (see Fig. 2) on the outer end of a lever 40, which is pivoted between its ends as at 41 to the carriage 18, and is pivoted at its end' as at 42 to the slide 10, whereby the slide, and consequently the blank carrier are moved 4to and from the grinds'tone. The cam slot 38 is of such form that in the to-and-fro movements imparted to the slide to correspondingly move the4 carrier, the movement toward the stone will be .a rapid one until the blanks engage the saine and the grinding operation begins.

whereupon the furtherfeed movement will be slower' as the metal is removed from the edges of the blank, and when the operation is completed, the slide is quickly retracted to its former position.

The transmitting shaft 35 also carries a bevel `gear d3 meshing with a bevel pinion on the lower end of a shaft 45 mounted in bearings on the slide 1G, the upper end of the shaft having Xed to it a bevel gear 46 (see ll" 2 and 3) which engages a bevel pinion i?, on the end of a horizontal shaft #i8 mounted in bearings in the standards 15 The shaft 4S has a 'cam drum 49 fixed to it provided with a cam slot 49.3 in which engages a pin 5() depending from the ejector blade, by which means the ejector blade is operated to eject the blanks from the holder, l

Beyond the worm 33 the counter-shaft 31 has fixed to it a sprocket wheel 51, around which passes a sprocketchain 52, which chain also passes around a larger sprocket .vheel 53 mounted loosely -carrier lsprocket wheel 53 is rotated continuously their motion from i on the shaft 8,-

which, it will be remembered, has the blank fixed to it. By this means the by the driving shaft through the medium of the countershaft, without, however, rotating the shaft 8 except intermittently, as will presently appear. The hub of the sprocket wheel carries a driving friction disk 54. see Fig. 4,

which bears against a driven friction disk 55 pinned to the shaft 8, the drivingr disk being pressed yieldingly against the driven disk by means of a spiral spring 56 bearing at its inner ends against the sprocket wheel and bearing at its outer end against a nut 5T on the end of the shaft 8. The two coperating friction disks constitute a clutch in the driving connections from the countershaft to the rotary blank carrier, the spring 5G being of a strength to cause the rotary motion of the driving disk to be imparted to the dri-ven disk and consequently to the blank carrier, except when the driven friction disk 'is restrained against rotation. As before stated, the blank carrier is turned on its axis only at intervals when it is in retracted position to permit the following blanks held in the carrier to be positioned relatively to the grindstone for the grinding operation, and this intermittent action is controlled automatically by the transmitting shaft, as shown more particularly in Figs. 14, 6 'and 7. Here it will be seen that the driven friction disk is formed in its peripheral edge with a series of equally spaced notches 58, in any one of which is adapted to engage the upper end of a vertically inovable rod 59 carrying a plunger disk 60 sliding in a cylinder 61 sustained by the slide 10 vertically beneath the disk 55, the plunger disk being acted on by an expansion spring 62 seated in the cylinder and acting to thrust the rod yieldingly upwardly and maintain its upper end in engagement with the edge of the driven friction disk. The rod extends below the cylinder, and has fixed to its lower end a head 63 which lstands in the path of a viper finger 64 projecting radially from the end of the transmitting shaft 35. The upper end of the rod normally seats in one of the notches in the driven friction disk and holds said disk and consequently the blank carrier against rotation, the driving friction disk at this time rotating continuously in contact with the ,driven disk. In the rotationof the transmitting shaft 35, the wiper linger thereon engages the head 63 on the rod and quickly pulls the latter down against the force of the spring G2, thereby withdrawing the end of the rod from the notch in the driven friction disk and releasing the latter, the wiper iinediately disengaging the head and permit- Eilng the rod-to be instantly moved upwardly again by the spring with the upper end bearing against and riding on the upper end of the disk. The spring pressure of the rotating driving disk against the driven disk now causes the latter and the connected blank carrier to be turned, and this action will continue until the next notch in the disk arrives opposite the upper end of the rod, whereupon the latter will seat in the notch and 'will bring the disk and consequently the ,blank carrier to rest. The edge of the driven disk is cammed, as shown, between the notches to cause'the rod to seat with certainty and to prevent overthrow of the disk.

By the mechanism described, the blank larrier is advanced on its axis sten by step, which action is controlled automatically and effected in timed relations to the back and forth movements of the carrier, to permit 'the latter to be turned to present the following blanks in position for the grinding operation.

n the operation ofthe machine, the blanks in the holder are ejected in pairs in succession into the carrier, the ejection ot' a pair'of blanks taking place while the carrier is at rest,f'as far as motion on its axis is concerned, but while it is being recipro ated axially and is moving the previously positioned blanks a ross the face 0i' the grindstone. Then the grinding operation ot' the engaged blanks is completed and produces one sharpened edge on each ci' the blanks, the slide 10 moves back and reti-acts the carrier, whereupon the carrier makes a partial revolution to bring the next pair of blanks into grinding position, and then the carrier moves up toward the stone and impingcs the edges of these blanks against the same. The carriage 18 is now reciprocated and imparts a correspending movement to the carrier in the direction of its axis, by which action the blanks are moved back and forth against the stone, and when sufficiently ground, the carrier again retracts and is turned as before tobring a new pair of blanks into position,-the driving mechanism 'for effecting these several movements, being cordinated with each other to produce them in the proper timed relations. After the machine has thus been operated to effect the grinding of one edge ot' each of the blanks in the holder, the discharged blanks are reinserted in the holder but in reverse position. so that when ejected into the carrier, the unground edges will project therefrom in position to be presented to the stone.

1n the accompanying drawings andioregoing description l have shown and described the blank holder formed to accommodate two piles ot blanks, and the blank carrier formed to sustain on each of its six sides a pair ot' blanks, but it will be understood that the invention is not limited to this particular form of the parts, as it` is obvious that the blanks may be entered singly instead of in pairs into the carrier without departing from the limits of the invention.

of the grindstone to com` pensate tor wear is effected inthe present in stance, as shown in Fig. by means ofi hand wheel 65j on the end of a shait 66 mounted in bearings on the 'traine Z before alluded to. The shaft 6G arries aworin engaging a worm wheel 68 on a threaded feed shaft 69 mountedl bearings on the trame 7, and screwed through ahig Z0 depending iromthe slide ii.

While in the foregoing description and accompanying drawings I. have invention embodied in the particular detaii form and construction of the .parts which prefer to adopt and which in practice has been found to answer to satisfactory de gree the ends to be attained, it4 will be anderstood that these details may be variously modified and changed by the skilled Inechanic without departing from the limits ot the invention; and further it will be anden stood that the invention is not limited to any particular form or construction of the parts except in so tar as such limitations are speci` lied in the claims.

Having thus described my invention, its construction and mode of operation, wha't claim and desire to secure by Letters Patent The adjust-nient of the United States, is as vfollows;

l. lna grinding machine, the combination -ota grinder provided with a fiat grinding face, a movable blank carrier provided with a plurality of blank seats adapted to hold the blanks with one edge exposed and e;:. tending parallel with the plane of the grinding tace, and means for intermittently posi tioning the holder relatively to to present the blanks in succession in a plane inclined to the plane oi the grinding face and with the edge oi the blank impinged against said tace; whereby the inipinged edge will be ground down on a bevel.

S2. ln a grirnlingmachine, the combination of a grinder, a blank carrier formed to hold a plurality of blanks, means for moving the carrier to and from the grinder to impinge the blanks against the same, and means coordinated ivith the to and fro movements of the carrier for advancing the carrier between its to-and-fro movements to bring the successive blanks into position 'for grinding.

3. In a grinding machine, the combination of a grinder, a blank carrier formed to held a plurality of blanks, means for advancing the carrier intermittently to position the successive blanks for presentation to the grinder, and means coordinated with the intermittent advance oit the carrier for merino;

`the carrier to and from the grinder to nn disclosed myy the grinder .and means coordinated with the bodily movements of the carrier for advancing the carrier on its axis of rotation to position the successive blanks for impingement against the grinder.

5. In a grinding machine,'the combination oi` a grinder provided with a flat grinding face. a movable blank carrier provided with a plurality of blank seats adapted to hold the blanks with one edge exposed and extending parallel with the plane ot' the grinding face, means for intermittently positioning the carrier relatively tothe grinder to hold the successive blanks in a plane inclined to the plane ot' the grinding face, and means for moving the carrier to and from the grinder to impinge the edge of the 'Juccessive blanks thereagainst.

6. In a grinding machine, the combination of a grinder, a carriage for receiving and holding blanks to be ground, means for automatically feeding blanks to the carriage, means for moving the carriage to and from the grinder to impinge the blanks against the same, means for moving the 4carriage back and 'forth to move the blanks on the grinder during the grinding operation, and means cordinated with the to and fro movement of the carriage for moving the carriage to bring successive blanks into position for contact with the grinder and to bring the carriage in position to receive additional blanks. V f

T. In a grinding machine, the combination of a grinder, a blank carrier Jformed to hold a plurality of blanks, means for moving the carrier to and'from the grinder to impinge the blanks a ,ainst the same, means cordinated with tie said to and fro movements for advancing the carrier between its to and fro movements to positionthe blanks in sucfession for impingement against the grinder. and means for reciprocating the carrier be-v tween its advancing' movements to move the blanks back and forth against the grinder.

8. in a grinding machine, the combination grinder, a blank holder formed to hold tue blanks cnfmasse, a blank carrier imposition to receive the blanks 'from the holder and `formed to hold a plurality of blanks at one time for successive impingement against the grinder, means tor moving the carrier periodically to position the held blanks in succession tor impingement against the grinder, the said carrier being brought to rest between each periodic movement, an ejector in position to engage the blanks in the holder and operable to eject the same into the carrier, and means for operating the ejector at intervals corresponding to the rest periods of the carrier. y

9. ln a grinding machine` the combination of a grinder, a blank holder formed to hold the blanks ea masse, a blank carrier in position' to receive the blanks from the holder and formed tohold a plurality of blanks for successive impingement against the grinder, means tor advancing the grinder periodically 'toposition the held blanks for impingement against the grinder, means for moving the carrier to and from the grinder to impinge the positioned blanks there againstpmeans for reciprocating the carrier between its periodic advances while the blanks are in contact with the grinder, an ejector in position to engage the blanks in the. holder and operable to eject the samtinto the carrier, and means,:tor operating said ejector at intervals between the periodic advances of the carrier.

l0. In a grinding machine, they combination of a grinder, a blank holder formed to hold a pile of superposed blanks, a rotary blank carrier -in position to receive the blanks from the holder and position them in operative relation to the grinder, an ejector in position to engage the blanks in the holder and in successioninto the carrier, means for rotating the carrier at intervals to position 'the blanks successively in operative relation to the grinder, means for moving the carrier to and from the grinder to limpinge the blanks in succession thereagainst, means for reciprocating the carrier between its intervals of rotation while the blanks are in contact with the grinder, and means for operating the ejector during such reciprocating movements of the carrier.

1l. ln a grinding machine, the combination ot' a grinder, a rotary blank carrier provided with a plurality ot seats adapted to support blanks with their edges in position for impingement against the grinder. means for rotating the carrier at intervals to position the blanks relatively to the grinder, and means for moving the carrier to and from the grinder to impinge the edges of the blanks against the same, and to permit the carrier to be turned to bring a new blank into posit-ion.

l2. In a grinding machine, the combination ot a grinder, a rotary blank carrier provided with a plurality ofv seats adapted to support the blanks with their edges arranged against the grinder, means for moving the carrier toward the grinder to engage the edge of the blank therewith, means for moving` the carrier away from the grinder to disengage the blank therefrom, and means coordinated with said movements for turning the carrier while the blank is disengaged to bring a` new blank into position.

13. ln a grinding machine. the combina-, tion oi a grinder, a base frame, a slide movable on the base frame to and from the grinder, a rotary blank carrier sustained by the slide and formed to holdV the blanks with their edges in position to be impinged against the grinder, means for advancing operable to eject the same y medien and retracting the slide to and from the grinder to respectively impinge the blank thereagainst and disengage it therefrom, and means for rotating the carrier to posh tion a new blank when the slide is retracted.

14. In a grinding machine, the combination of a grinder, a base frame, a carriage movable on said base frame, a slide movable on the carriageat righty angles to the path of movement ci the carriage, a blank carrier sustained by the slide and formed to hold a blank with its edge in position for iinpingen ment against the grinder, means for advancing the slide to gage' the blank therewith and disengage it therefrom, means for reciprocating the carriage while the blank is engaged with the grinder, and means for moving the carrier to position a new blank while the slide is in retracted position.

15. In a grinding machine, the combination of a grinder, a base traine, a. carriage mounted thereon parallel with the plane o' the `face of the grinder, a slide movable on the carriage to and from the grinder, a rotary blank carrier on the slide formed to hold the blanks with their edges in position to be impinged against the grinder, means for advancing and retracting the slide to and from the'grinder to engage the blanks therewith and'disengage the same therefrom, means for reciprocating the carriage while the blanks are engaged with the grinder, and means for rotating the carrier to bring a new blank into position when the slide is retracted.

16, In a grinding machine, the combination of a rotary grinder, a blankv carrier formed tox hold the blanks with their edges in position to be impinged against the grinder, and movable to and from the same, and operating means for the carrier acting to feed the same rapidly toward the grinder to eil'ect lthe initial engagement of the blank therewith, and operating thereafter to feed the carrier more slowly during the grinding operation.

17. In a gindinginachine, the combination of a grinder provided with a grinding lface, a blank carrierrotatable about an anis extending pa `allel or substantially so with said grinding face, and provided with a plurality of' seats for the blanks at intervals around 'the carrier, and formed to sustain the blanks with their edges in position to be engaged with the grinder in succession, means 'lor rotating the carrier on its axis to position the blank in a plane inclined to the plane of the face of the grinder, and means ior moving the carrier` toward the grinder. to cause the edge of the blank to iinpinge there against at such inclination.

18. ln a grinding machine, the combina tion of a rotary grinder provided with a grinding tace, a blank carrier rotatable tletll' and from the grinder te en-- an axis extending parallel er snhstanti se with the face ol the grinder, Vneans supporting a blank on the carrier in a n tangent to a circle described Jrorn the of the carrier as a center, and means 'for a. vancing the carrier on its anis to position the blank in a plane inclined to the plane et the tace of the grinder.

19. ln a machine for grinding a ciitt edge on blanks, a carrier ter the l rotatable about an axis, and provided means to sustain the blanks planes gential 'to a circle described :from the of the carrier as a center, with the said blanks in position te be engaged the grinder. l

20. l'n a grinding machine, the ci tion of a grinder provided with-a combina- 9 means for sustaining the blanks at interval.; therearonnd in planes tangent to a. circle described froin the airis of the cav 'er as center, means for moving the carrier to and from the grinder to respectively engage and disengage the edges of the blanks therewith., and means for advancing the carrier axis when'it is moved away from the grin to position the blanks in succession in a inclined to that of the face of the grin ln a grinding machine, the coi tion of a grinder provided with a. griml face, a base trame, a carriage movable or. base frame in a path parallel or so with the face of the grinder, a drive sham, means operated thereby tor reciprocating yl the carriage on the base trarne, a slideniov able on the carriage te and from the grinder a shaft on thecarriage operated by l e y shaft, connections between Isuch s slide for reciprocating the same, carrier for the blanks, mounted on' and driving conne .ns be shaft and the carrier- 'or rotating tl 23. ln a grinding mac-him. the t tion of agrinder provided with a face, a base iframe, a carriage movab c i base rarne in apath parallel or subs* so with the tace of the grinder, a meansoperated by the d ciprceating the er.

a slide movable on the carriage to and from the grinder, a countershat on the carriage rotatable by the drive shaft, a transmitting shatt on the carriage rotatable from the conntershatt, driving connections between the transmitting shaft and Slide for recipro eating the latter, a blank carrier mounted for rotation on the slide, and driving connections between the Conntersha'tt and blank carrier tor rotating the same.

2. ln a grinding machine, the combination ot' a grinder provided with a grinding :taee5 a base traine, a carriage movable on the base frame in a path parallel or substantially so with the face ot the grinder, a drive shatt7 means operated by the drive sha tt for reciprocating the carriage on the base trame, a slide movable on the carriage to and from the grinder.i a shaft on the carriage operated by nections between said reciprocating the latter, the blanks7 shaft and slide for a rotary carrier for connections between the drive shaft and carrier for rotating the same, a holder 'tor the blanks sustained by the slide, an ejector also sustained by the slide and operable to engage the blanks and eject the same into therarrier, and connections between the slide operating shaft and ejector tor oj'ierating the latter.

:25. in a grinding machine, the combina.- :ion ot a grinder provided with a grind ng tace` a base frame, a carriage movable on the base frame parallel or substantially so with the face ot the grinder, a drivevsl'iaft. means operated thereby for reciprocating the carriage, a slide movable on the earriage to and from the grinder, a countershaft on the carfage operated by the drive shaft, a transmitting .shaft on the carriage operated by tle cmintershatt, connections between the transmitting sbat't and slide for reciprothe drive shat't` con-' eating the saine, a blank farrier rotatable on the slide7 driving connections between the carrier and conntershaft for rotating the carrier, a holder for the blanks mounted on the slide, an ejector also mounted on the slide and operable to eject the blanks trom the'y holder into the carrier, and connections between the transmitting shaft and ejector for operating the same.

26. In a grinding maehire. ldie conxbination of a grinder, a blank carrier movable intermittently to position the blank for impingement against the grinder, and movable also to and from the grinder to impinge the blank thereagainst, a driving shaft, operating connections between the driving shaft and carrier including a clutch, means operated by the dri-ving shaft tor controlling the clutch to move the carrier intermittentlyu and means operated by the driving shaft for effecting the to and fro movements of the carrier.

27. ln a grinding machine` the Combination of .i grinder` a rotary blank carrier movable intermittently on its axis to position the blanks for impingement against the grinder. and movableI also bodily to and trom the grinder to impinge the blanks thereagainst` a driving shaft` a countershaft operated by the driving shaft` opcrating connections between the conntcrshatt and carrier 'for rotating thc latter. said connections including a clutch. a tansmitting shaft operated b v thc counter shaft and acting to movc the carrier to and from the grinder. and means operated by thc transmitting `shaft tor controlling the clutch to rotate thc carrier intermittently.'

ln testimony whereof. l have affixed my signature hereto. 

